Remove PlatformCanvas::GetBitmapContext()

skia/ext/bitmap_platform_device_mac.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 #define SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
@@ skipping 28 matching lines @@
                                       bool is_opaque, bool do_clear = false);
 
   // Creates a context for |data| and calls Create.
   // If |data| is NULL, then the bitmap backing store is not initialized.
   static BitmapPlatformDevice* CreateWithData(uint8_t* data,
                                               int width, int height,
                                               bool is_opaque);
 
   ~BitmapPlatformDevice() override;
 
-  // PlatformDevice overrides
-  CGContextRef GetBitmapContext(const SkMatrix& transform,
-                                const SkIRect& clip_bounds) override;
-
  protected:
   BitmapPlatformDevice(CGContextRef context,
                        const SkBitmap& bitmap);
 
   SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;
 
  private:
+  NativeDrawingContext BeginPlatformPaint(const SkMatrix& transform,
+                                          const SkIRect& clip_bounds) override;
+
   void ReleaseBitmapContext();
 
   // Loads the current transform and clip into the context. Can be called even
   // when |bitmap_context_| is NULL (will be a NOP).
   void LoadConfig(const SkMatrix& transform, const SkIRect& clip_bounds);
 
   // Lazily-created graphics context used to draw into the bitmap.
   CGContextRef bitmap_context_;
 
   DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_MAC_H_